I love the Clinton Anderson "handy stick" and string. It's a lot (I won't say better, it's a different application) different that a lunge whip. I think it's more controllable since it doesn't flex and wiggle under it's own weight. My horses really respond to it where they didn't to a lunge whip. I do use a dressage whip if I need extra implusion under saddle, but my sister rides with her stick and string sometimes. I do recommend, though, buy your stick through a catalog or something. I saw one for under $15 in a Rod's catalog, I think. I bought mine at Equine Affaire for $10. I forget what Clinton charges for his "official" stick, but it was astronomical. Along with the stick, I would also say invest in a rope halter and lungeline, again not necessarily name brand. I made my own "custom" long line, it was cheaper, lol. My rope halter cost $5 at TSC. I also recommend this book - http://www.amazon
.com/Clinton-Andersons-Downunder-Horsemanship-Establishing/dp/1570762848/ref=sr_1_2?ie=UTF8&s=books&qid=1245444658&sr=8-2 - you can find it cheaper, I'm sure, but it has wonderful and detailed info and exercises using the stick, etc.
Love CA, great results!